show-tooltip

Arguments:
widget

This generic function is called internally to show the tooltip of a
control. This function is not normally called by an application, but
wrapper methods may be added to act when a tooltip is invoked
after the mouse pauses over a control. This may be useful, for
example, for displaying some other form of help (such as a status-bar
message) after the mouse has paused over a control.

Note that this generic function is called even if the show-tooltips
configuration option has been turned off. This allows showing some
custom form of help for a control without using tooltips, which may be
handy if tooltips are considered more annoying than a status-bar
message, for example.

Example

Here is an example method that could be added to cause dialog-item
help-strings to be displayed in the status-bars of their parent
windows (or other ancestor windows) whenever the mouse cursor pauses
over any dialog-item. See help-string.